PROFESSIONAL GRADE Grow Room Glasses/Goggles &bull; Fits over Prescription Frames Indoor/Outdoor Hydroponics Anti UV, Reflection, Glare Optical Protection COMFORT FIT (High Pressure Sodium (HPS) PROFEESSIONAL GRADE GRGs Designed for HPS (High Pressure Sodium) Bulbs Block harsh yellow UV rays from outdoor natural sunlight and indoor grow room lighting. Glare is drastically reduced and color is corrected, alleviating eyestrain NO CHEAP POLY LENSES! - CR-39 Lenses offer much better optical qualities Compare to Method 7 Brand but much more affordable!